From 80b84f1500a01a03003582d14524ba520d298a10 Mon Sep 17 00:00:00 2001
From: ouv <ouv@opencascade.com>
Date: Fri, 29 Apr 2011 10:48:26 +0000
Subject: [PATCH] Bug IPAL22437: 6.3.0: Changes of Type of Horizontal scale in
 Preferences are applied after restart application only

---
 doc/salome/gui/input/plot2d_viewer.doc      | 12 +++++++++---
 doc/salome/gui/input/salome_preferences.doc |  6 +++++-
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/doc/salome/gui/input/plot2d_viewer.doc b/doc/salome/gui/input/plot2d_viewer.doc
index fa294f587..9ce22f89c 100644
--- a/doc/salome/gui/input/plot2d_viewer.doc
+++ b/doc/salome/gui/input/plot2d_viewer.doc
@@ -64,14 +64,18 @@ spline.</center>
 <br>
 \image html plot2d_log.png
 <br><center>These buttons allow to switch horizontal axis scale to the
-linear or logarithmic mode.</center>
+linear or logarithmic mode.<br>Note that the logarithmic mode of the
+horizontal axis scale is allowed only if the minimum value of abscissa
+component of displayed points is greater than zero.</center>
 <hr>
 
 \image html plot2d_linear_y.png
 <br>
 \image html plot2d_log_y.png
 <br><center>These buttons allow to switch vertical axis scale to the
-linear or logarithmic mode.</center>
+linear or logarithmic mode.<br>Note that the logarithmic mode of the
+vertical axis scale is allowed only if the minimum value of ordinate
+component of displayed points is greater than zero.</center>
 <hr>
 
 \image html plot2d_legend.png
@@ -101,7 +105,9 @@ description table on the XY plot (to the \b Left, to the \b Right, on
 - <b>Background color</b> of the XY plot.
 - <b>Scale mode</b> here you can select the type of scaling (\b
 Linear or \b Logarithmic) for <b>X (Horizontal)</b> or <b>Y
-(Vertical)</b> axes separately.
+(Vertical)</b> axes separately. Note that the \b Logarithmic scale can
+be used only if the minimum value of corresponding component (abscissa
+or ordinate) of all points displayed in the viewer is greater than zero.
 - <b>Axis ...</b> options group allows to specify additional settings for each axis separately:
   - <b>Axis title</b> - an axis title
   - <b>Grid / Axes marks</b>  here you can define the maximum number of major
diff --git a/doc/salome/gui/input/salome_preferences.doc b/doc/salome/gui/input/salome_preferences.doc
index 0a6e6b9b3..59d261f4e 100644
--- a/doc/salome/gui/input/salome_preferences.doc
+++ b/doc/salome/gui/input/salome_preferences.doc
@@ -176,7 +176,11 @@ dialog box press the &quot;<b>...</b>&quot; button(see the picture below).
   markers in your graphs.
   - <b>Horizontal</b> and <b>Vertical axis scale</b> - this submenu allows you to set
   the scale for vertical and horizontal axes. It can be either <b>Linear</b> or
-  <b>Logarithmic</b>.
+  <b>Logarithmic</b>. Note that the  <b>Logarithmic</b> scale can be used only
+  if the minimum value of corresponding component (abscissa or ordinate)
+  of all points displayed in the viewer is greater than zero.
+  If this condition is not met, the scale is switched to <b>Linear</b>
+  automatically, even if it is set to <b>Logarithmic</b>.
   - <b>Background Color</b> - this submenu allows to select the background
   color. Click on the colored line to access to the 
   \ref select_color_and_font_page "Select Color" dialog box.
-- 
2.39.2